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已不能满足要求,需与焊接技术相结合.然而,随着合金中难熔合金元素(W,Re,Ta,Mo)的添加,采用传统的熔焊方法,接头易出现组织偏析,杂晶,脆性相和低熔点共晶相等缺陷,并伴有热裂纹产生[7-10]. 瞬时液相扩散焊(Transient liquid phase, TLP)由DUVALL等[11]提出,此方法兼具高温钎焊和固相扩散焊的特点[7, 10],其过程是将一种与基体成分相似但添加降熔元素的......
, a flowsheet of direct separation of Sc from simulated ion adsorption rare earth enrichment was proposed and verified by lab-scale experiment. 2 Experimental 2.1 Materials and reagents RE(Cl)3·n H2O (RE: Sc, Y......
of the current pixel. Figure 9 Comparison of ViBe with post-processing of detection: In this paper, the basic metrics [26] used to evaluate detection results are mainly selected as Pre (precision), Re......
in this work were with respect to a self-assembled Ag/AgCl (1.0 wt.%) reference electrode in a round bottom mullite tube. Fig. 1 Schematic diagram of experimental set-up (CE-Counter electrode; RE......
of Al, RE and Si element on the microstructure, mechanical and creep properties of Mg-Al alloys [J]. Mater Sci Eng A, 2009, 523(1-2): 1-6. [4] AZZEDDINE H, ABDESSAMEUD S, ALILI B, BOUMEERZOUG Z, BRADAI......
and moderate thermal conductivity cast Mg alloy with multiple RE via heat treatment [J]. Materials Science & Technology, 2018, 34: 1076-1084. [2] Swetha S, Ravikumar D, Anand K, Kondaiah V, Ratna S......
Trans. Nonferrous Met. Soc. China 31(2021) 1689-1699 Effect of extrusion ratios on hardness, microstructure, and crystal texture anisotropy in pure niobium tubes subjected to hydrostatic extrusion Jongbeom LEE1, Haguk JEONG1, Sangyong PARK1,2 1. Advanced Materials and Process R&D Department, Kor......
by the model proposed by BURNS et al [16]. At the oxygen inlet, the Reynolds number Re=13600>2300, and the flow is turbulent. Therefore, this study uses the shear stress transport (SST) k-ω turbulence [17......
; (10) 式中:ρ为海水密度,为曳力系数,uw为水质点的速度,Cm为惯性力系数,为水质点的加速度.Cd和Cm的取值与结构物的Re数和Kc数有关,一般需要实验测得,在不具备实验条件的前提下,也可采用相关标准和规范中的推荐值.这里参考GB/T 30217.2-2016,取和. 1.3 平衡方程的求解与验证 本文采用Newmark法进行......
; (10) 式中:ρ为海水密度,为曳力系数,uw为水质点的速度,Cm为惯性力系数,为水质点的加速度.Cd和Cm的取值与结构物的Re数和Kc数有关,一般需要实验测得,在不具备实验条件的前提下,也可采用相关标准和规范中......